Subject: Re: Lowest serial latency?
To: Chris Baird <>
From: Jon Lindgren <>
List: netbsd-users
Date: 12/28/1999 10:15:32
On 29 Dec 1999, Chris Baird wrote:

> One thing to do if your milliseconds count is to make sure that
> FIFO_TRIGGER_14 (see /sys/dev/ic/com.c) isn't set on the port.  Either
> by munging (s/TRIGGER_14/TRIGGER_1/), or by placing a 8250/16450-based
> serial card in the machine.

I'm assuming that if I have a 16550x card that I can just clear that
bit?  Or should I invest the time and find an old 8250?  I belive all the
ports on the ppro are 16550a/b/c's, but I'm not sure about the equivilent
uarts on the sparcs (zilogs?) or alphas (zilogs, too?).

Thanks for the info.

 -Jon Lindgren
 "Xyzzy!  You're a duck!",